PRESS-NEWS.org - Press Release Distribution
PRESS RELEASES DISTRIBUTION

Perovskite memory devices with ultra-fast switching speed

Perovskite memory devices with ultra-fast switching speed
2021-06-22
(Press-News.org) A research team led by Professor Jang-Sik Lee of Pohang University of Science and Technology (POSTECH) has successfully developed the halide perovskite-based memory with ultra-fast switching speed. The findings from this study were published in Nature Communications on June 10, 2021.

Resistive switching memory is a promising contender for next-generation memory device due to its advantages of simple structure and low power consumption. Various materials have been previously studied for resistive switching memory. Among them, halide perovskites are receiving much attention for use in the memory because of low operation voltage and high on/off ratio. However, halide perovskite-based memory devices have limitations of slow switching speed which hinder their practical application in memory devices.

To this, the researchers at POSTECH (Prof. Jang-Sik Lee, Prof. Donghwa Lee, Youngjun Park, and Seong Hun Kim) have successfully developed ultra-fast switching memory devices using halide perovskites by using a combined method of first-principles calculations and experimental verification. From a total of 696 compounds of halide perovskites candidates, Cs3Sb2I9 with a dimer structure was selected as the best candidate for memory application. To verify the calculation results, memory devices using the dimer-structured Cs3Sb2I9 were fabricated. They were then operated with an ultra-fast switching speed of 20 ns, which was more than 100 times faster than the memory devices that used the layer-structured Cs3Sb2I9. In addition, many of the perovskites contain lead (Pb) in the materials which has been raised as an issue. In this work, however, the use of lead-free perovskite eliminates such environmental problems.

"This study provides an important step toward the development of resistive switching memory that can be operated at an ultra-fast switching speed," remarked Professor Lee on the significance of the research. He added, "this work offers an opportunity to design new materials for memory devices based on calculations and experimental verification."

INFORMATION:


[Attachments] See images for this press release:
Perovskite memory devices with ultra-fast switching speed

ELSE PRESS RELEASES FROM THIS DATE:

Actively addressing inequalities promotes social change

2021-06-22
People who have contact with other social groups are more likely to be committed to social justice. However, an international study led by the University of Zurich has shown that for this to be the case, power relations and discrimination must be actively addressed and group-specific needs must be met. It is important that disadvantaged group members, such as racial minorities and LGBTIQ+ individuals, are given a voice, and that those who belong to advantaged groups do not feel labeled as biased. People who are socially disadvantaged or discriminated against because they belong to a particular group often join forces with other disadvantaged people to fight together for better rights. Prominent examples of such political engagement are the women's rights movement, Black Lives ...

How shadow banks have exploited the COVID-19 crisis

2021-06-22
Rather than levelling inequality, as the Great Depression did, the COVID-19 pandemic has exacerbated inequalities around the world allowing some wealthy investors to benefit from the crisis and make a fortune on the misfortune of others. During March to December last year, U.S. billionaires increased their wealth by over one-third, to one trillion dollars, while millions of Americans faced deep financial hardship. New research from Copenhagen Business School has examined how American "shadow banks"- which are less regulated and include private credit intermediaries such as private equity, venture capital, and hedge fund firms - have invested in ways that extract profit from the misfortunes of frontline workers, struggling companies, ...

Childhood trauma can make people like morphine more

2021-06-22
People who have experienced childhood trauma get a more pleasurable "high" from morphine, new research suggests. University of Exeter scientists compared the effects of morphine on 52 healthy people - 27 with a history of childhood abuse and neglect, and 25 who reported no such experiences in childhood. Those with childhood trauma liked morphine (an opioid drug) more, felt more euphoric and had a stronger desire for another dose. Those with no childhood trauma were more likely to dislike the effects and feel dizzy or nauseous. "There are high rates of childhood trauma in people with addictions. Our findings ...

Improving asphalt road pavement with nano-engineered particles

Improving asphalt road pavement with nano-engineered particles
2021-06-22
Warm mix asphalt (WMA) is gaining attention in the asphalt industry as an eco-friendly and sustainable technology. WMA reduces energy consumption while simultaneously minimizing vapors and greenhouse gas emissions during the production of asphalt mixtures in comparison to conventional asphalt. However, high moisture susceptibility and ageing of asphalt make WMA less durable on the roads. To address both issues in WMA technology, a team from the Energy Safety Research Institute (ESRI) at Swansea University and Braunschweig Pavement Engineering Centre (ISBS) at the Technical University of Braunschweig have discovered ...

Running to music combats mental fatigue a study suggests

2021-06-22
Listening to music while running might be the key to improving people's performance when they feel mentally fatigued a study suggests. The performance of runners who listened to a self-selected playlist after completing a demanding thinking task was at the same level as when they were not mentally fatigued, the research found. The study is the first to investigate the effect of listening to music playlists on endurance running capacity and performance when mentally fatigued. Researchers at the University of Edinburgh used two tests to study how listening to music affected the running performance of ...

Patents help build a global map of new space industry

Patents help build a global map of new space industry
2021-06-22
Skoltech researchers and their colleagues from Russia and Serbia have reviewed almost a thousand patents held by some two hundred organizations involved in the New Space economy. The analysis helped draw a comprehensive picture of technology trends in the field. The paper was published in the journal Progress in Aerospace Sciences. "New Space" is a loosely defined term that encompasses the recent flurry of space-related activities coming from smaller actors rather than a handful of space-faring nations. Put somewhat simply, while the Apollo missions were more traditional, SpaceX, Rocket Lab (launching small satellites from New Zealand) or LeoLabs (a space junk tracking company) are undeniably parts of a new and different ...

As many state of emergency declarations during first pandemic wave as in preceding decade

2021-06-22
In 2020, as many states of emergency were declared around the world during the first wave of the COVID-19 pandemic as there were in the entire previous decade. The influence of neighbouring countries on each other, weak democracies and poor pandemic preparedness are some of the explanations, according to research from the University of Gothenburg and Stockholm University. A state of emergency is a situation in which a country's ordinary laws and rights are suspended and authorities are given increased powers. A state of emergency is declared by the government of a country, often as a result of war, civil unrest or natural disasters. The introduction of a curfew is ...

An overview of protected satellite communications in the intelligent age

An overview of protected satellite communications in the intelligent age
2021-06-22
Protected Satellite Communications (SatComs) exhibit specific characteristics such as security, intelligence, anti-jamming, and nuclear disaster survivability. They constitute one of the key research topics in modern communications. Currently, the United States is using the latest Advanced Extremely High-Frequency (AEHF) system to provide protected communications. Other countries are also employing their own protected SatCom systems to meet future operational requirements. Furthermore, in the modern intelligent age, many intelligent-related technologies are introduced into the protected SatCom ...

Researchers discover a novel class of drugs that may help treat a deadly type of lymphoma

2021-06-22
New York, NY (June 22, 2021) - A new class of drugs that inhibits a "master switch" involved in the vast majority of cases of mantle cell lymphoma (MCL), a fatal subtype of non-Hodgkin's lymphoma, has been discovered by researchers at Mount Sinai. In a study in Clinical Cancer Research published in June, the team reported that the drugs, known as small-molecule inhibitors of the SOX 11 oncogene, are toxic to MCL tumor development in human cells studied outside the body. If the effect is replicated in living patients, the discovery could lead to new therapies for a disease that is highly resistant to existing treatments. "The SOX 11 protein, which is expressed in up to 90 percent of mantle cell lymphoma patients, is an attractive target for therapy," said senior author Samir Parekh, MD, ...

New universal vaccine targets coronaviruses to prevent future pandemics

New universal vaccine targets coronaviruses to prevent future pandemics
2021-06-22
CHAPEL HILL, N.C. - Scientists at the University of North Carolina Gillings School of Global Public Health have developed a universal vaccine that protected mice not just against COVID-19 but also other coronaviruses and triggered the immune system to fight off a dangerous variant. While no one knows which virus may cause the next outbreak, coronaviruses remain a threat after causing the SARS outbreak in 2003 and the global COVID-19 pandemic. To prevent a future coronavirus pandemic, UNC-Chapel Hill researchers designed the vaccine to provide protection from the current SARS-CoV-2 coronavirus and a group of coronaviruses known to make the jump from animals to humans. The findings were published ...

LAST 30 PRESS RELEASES:

Thirty-year mystery of dissonance in the “ringing” of black holes explained

Less intensive works best for agricultural soil

Arctic rivers project receives “national champion” designation from frontiers foundation

Computational biology paves the way for new ALS tests

Study offers new hope for babies born with opioid withdrawal syndrome

UT, Volkswagen Group of America celebrate research partnership

New Medicare program could dramatically improve affordability for cancer drugs – if patients enroll

Are ‘zombie’ skin cells harmful or helpful? The answer may be in their shapes

University of Cincinnati Cancer Center presents research at AACR 2025

Head and neck, breast, lung and survivorship studies headline Dana-Farber research at AACR Annual Meeting 2025

AACR: Researchers share promising results from MD Anderson clinical trials

New research explains why our waistlines expand in middle age

Advancements in muon detection: Taishan Antineutrino Observatory's innovative top veto tracker

Chips off the old block

Microvascular decompression combined with nerve combing for atypical trigeminal neuralgia

Cutting the complexity from digital carpentry

Lung immune cell type “quietly” controls inflammation in COVID-19

Fiscal impact of expanded Medicare coverage for GLP-1 receptor agonists to treat obesity

State and sociodemographic trends in US cigarette smoking with future projections

Young adults drive historic decline in smoking

NFCR congratulates Dr. Robert C. Bast, Jr. on receiving the AACR-Daniel D. Von Hoff Award for Outstanding Contributions to Education and Training in Cancer Research

Chimpanzee stem cells offer new insights into early embryonic development

This injected protein-like polymer helps tissues heal after a heart attack

FlexTech inaugural issue launches, pioneering interdisciplinary innovation in flexible technology

In Down syndrome mice, 40Hz light and sound improve cognition, neurogenesis, connectivity

Methyl eugenol: potential to inhibit oxidative stress, address related diseases, and its toxicological effects

A vascularized multilayer chip reveals shear stress-induced angiogenesis in diverse fluid conditions

AI helps unravel a cause of Alzheimer's disease and identify a therapeutic candidate

Coalition of Autism Scientists critiques US Department of Health and Human Services Autism Research Initiative

Structure dictates effectiveness, safety in nanomedicine

[Press-News.org] Perovskite memory devices with ultra-fast switching speed